In GeneSpring analysis, 12 genes which were 5 fold higher in sensitive cell lines than in resistant cell lines were chosen. Among them, tumor-related genes were SLIT2 and synovial sarcoma X (SSX) 3. SLIT2 is one of tumor suppression genes, which was expressed with IHC in 3 NSCLCs with the response to pemetrexed over 12 months....It was suggested that SLIT2 would predict the long-term response to pemetrexed.